Over the last year, Ellsberg has been an outspoken advocate of fellow whistleblower Snowden, publishing editorials in the Washington Post and The Guardian praising his efforts in June. He has also often spoke out in favor of Wikileaks and Private First Class Chelsea Manning.

During the AmA, Redditors asked some interesting questions, including whether Snowden should return to the United States and face charges as he did. Ellsberg's answer was a very definitive "no." Check out the full AmA here, and see highlights below.